Evolution and Natural Selection Lab Coursework Example | Topics and Well Written Essays - 250 words

Evolution and Natural Selection Lab - Coursework Example Archaeologists found that there were fossil remains of extinct animals as they dug deeper into the strata. They could see similarities in the different fossils but could not comprehend why or how they existed. Darwin influenced the theory of evolution in his study of finches and tortoises of the Galapagos Islands. Though different, Darwin could note similarities that converged the different birds to the same ancestors. The tortoise in the different islands though seemingly similar, Darwin noted that they had distinct variation. His breakthrough was in 1859 when he published the book On the Origin of Species (Evolution and Natural Selection, 2010). First, Darwin views a species as organisms that can vary over time and space. He says that the equivalent of today’s organisms that existed earlier in life varied in form and behavior from those of today, as do those in distanced geographic regions today. Fossils also differ thus supporting the claim (Evolution and Natural Selection, 2010). Second, he says that all organisms have shared common ancestors. The relations can be traced over millions of years ago. Different organisms diverged from their common ancestry to form their own independent species. Sharing of common ancestry is manifested by the similarities that different species share today e.g. we share common ancestry with chimpanzees dating back around eight million years back. Lastly, Darwin puts forth that evolution is steady slow process. Fossil records showed this form of process plus the emergence of unprecedented novel organisms in Darwin’s time (Evolution and Natural Selection, 2010). Natural selection entails variation, inheritance, excessive speed of population growth and differential survival and reproduction. Related organisms vary in form and behavior and include variations in body size, facial markings, hair color and so on. Inheritance involves passing of certain traits

Eaarth book Essay Example | Topics and Well Written Essays - 750 words

Eaarth book - Essay Example The author begins by exploring environmental problems in the current earth or changes that people have caused on the planet. Global warming is a direct consequence of human activity. However, people deal with the problem as a future problem instead of considering it as a modern problem. This makes them to lack seriousness or emphasis on the problem and possible solutions. The phenomenon has also contributed to the abnormalities and misplacement of priorities in the modern earth. For instance, it is only in the eaarth where people will import more oil than food. In addition, in eaarth the largest company deals with production of fossil fuels and manufacture of cars instead of food production (McKibben 25). The misplaced priorities are the determinant of our modern economies. The author argues that most countries are concerned with economic growth than the effects that environmental growth has on their economies. According to the author, the different methods used to measure economic growth are invalid. This is because the different measures of economic growth do not indicate the actual economic position of a country. For instance, measures of economic growth in a country do not capture the effect of economic activities on the environment. â€Å"Therefore, we need to re-define the term growth in our new planet† (McKibben 48). In the second chapter, the author combines scientific findings and political aspirations to create political economics. This indicates that people have left the responsibility of the environment to global politicians. According to the author’s argument, politicians cannot provide solutions by themselves. As wealthy countries such as the US plan for a n unlimited economic growth, poor nations are struggling with problems that have resulted from environmental degradation. This indicates that we are moving towards a dark future. These problems nullifies the claims that people in developed have over